Problem with Empty Json

Cannot create Object, when zeit_total_daily is empty

Jugenddienst Stunden/Models/JsonSingleOrEmptyArrayConverter.cs

@@ -0,0 +1,70 @@
+using Newtonsoft.Json;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Jugenddienst_Stunden.Models {
+	public class JsonSingleOrEmptyArrayConverter<T> : JsonConverter where T : class {
+		public override bool CanConvert(Type objectType) {
+			return typeof(T).IsAssignableFrom(objectType);
+		}
+
+		public override bool CanWrite { get { return false; } }
+
+		public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer) {
+			var contract = serializer.ContractResolver.ResolveContract(objectType);
+			if (!(contract is Newtonsoft.Json.Serialization.JsonObjectContract || contract is Newtonsoft.Json.Serialization.JsonDictionaryContract)) {
+				throw new JsonSerializationException(string.Format("Unsupported objectType {0} at {1}.", objectType, reader.Path));
+			}
+
+			switch (reader.SkipComments().TokenType) {
+				case JsonToken.StartArray: {
+						int count = 0;
+						while (reader.Read()) {
+							switch (reader.TokenType) {
+								case JsonToken.Comment:
+									break;
+								case JsonToken.EndArray:
+									return existingValue;
+								default: {
+										count++;
+										if (count > 1)
+											throw new JsonSerializationException(string.Format("Too many objects at path {0}.", reader.Path));
+										existingValue = existingValue ?? contract.DefaultCreator();
+										serializer.Populate(reader, existingValue);
+									}
+									break;
+							}
+						}
+						// Should not come here.
+						throw new JsonSerializationException(string.Format("Unclosed array at path {0}.", reader.Path));
+					}
+
+				case JsonToken.Null:
+					return null;
+
+				case JsonToken.StartObject:
+					existingValue = existingValue ?? contract.DefaultCreator();
+					serializer.Populate(reader, existingValue);
+					return existingValue;
+
+				default:
+					throw new InvalidOperationException("Unexpected token type " + reader.TokenType.ToString());
+			}
+		}
+
+		public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer) {
+			throw new NotImplementedException();
+		}
+	}
+
+	public static partial class JsonExtensions {
+		public static JsonReader SkipComments(this JsonReader reader) {
+			while (reader.TokenType == JsonToken.Comment && reader.Read())
+				;
+			return reader;
+		}
+	}
+}